bee's body to transport back to their colony and other plants for fertilization. This is the act of buzz pollination in which most species of the Bombus behave that allows for flora to be distributed and fertilised. Ecology Pyrobombus are commonly found in open environments such as meadows, grass fields, and forests. At these locations, bees would face predators. Common predators would be bears, birds, badgers and hornets. Not all bees are generalist forages. Bees vary in dietary and foraging needs that influence their population and flora growth. Ecology in Europe Pyrobombus brodmannicus P. brodmannicus are found in higher altitudes like the French Alps. Although it forages on a variety of plants, the P. brodmannicus bees in Caucasia specialise in the Boraginaceae in which the numbers are low. Distribution Pyrobombus bees are commonly widespread in the Northern Hemisphere and covers close to 50% of North American fauna. Most Pyrobombus bee species are experiencing habitat loss, with a few endangered in certain geographical locations. Species list The subgenus contains the following species: Bombus abnormis (Tkalcu, 1968) Bombus ardens Smith, 1879 Bombus avanus (Skorikov, 1938) Bombus beaticola (Tkalcu, 1968) Bombus bifarius Cresson, 1878 Bombus bimaculatus Cresson, 1863 Bombus biroi Vogt, 1911 Bombus brodmannicus Vogt, 1909 Bombus caliginosus (Frison, 1927) Bombus centralis Cresson, 1864 Bombus cingulatus Wahlberg, 1854 Bombus cockerelli Franklin, 1913 Bombus ephippiatus Say, 1837 Bombus flavescens Smith, 1852 Bombus flavifrons Cresson, 1863 Bombus frigidus Smith, 1854 Bombus haematurus Kriechbaumer, 1870 Bombus huntii Greene, 1860 Bombus hypnorum (Linnaeus, 1758) Bombus impatiens Cresson, 1863 Bombus infirmus (Tkalcu, 1968) Bombus infrequens (Tkalcu, 1989) Bombus johanseni Sladen, 1919 Bombus jonellus (Kirby, 1802) Bombus kotzschi Reinig, 1940 Bombus lapponicus (Fabricius, 1793) Bombus lemniscatus Skorikov, 1912 Bombus lepidus Skorikov, 1912 Bombus luteipes Richards, 1934 Bombus melanopygus Nylander, 1848 Bombus mirus (Tkalcu, 1968) Bombus mixtus Cresson, 1878 Bombus modestus Eversmann, 1852 Bombus monticola Smith, 1844 ?Bombus oceanicus Friese, 1909 Bombus parthenius Richards, 1934 Bombus perplexus Cresson, 1863 Bombus picipes Richards, 1934 Bombus pratorum (Linnaeus, 1761) Bombus pressus (Frison, 1935) Bombus pyrenaeus Pérez, 1880 Bombus rotundiceps Friese, 1916 Bombus sandersoni Franklin, 1913 Bombus sitkensis Nylander, 1848 Bombus sonani (Frison, 1934) Bombus subtypicus (Skorikov, 1914) Bombus sylvicola Kirby, 1837 Bombus ternarius Say, 1837 Bombus vagans Smith, 1854 Bombus vancouverensis Cresson, 1878 Bombus vandykei (Frison, 1927) Bombus vosnesenskii Radoszkowski, 1862 Bombus wangae Williams et al., 2009 ?Bombus wilmattae Cockerell, 1912 References Bumblebees Insect subgenera